泾阳短水准异常与地震关系浅析  

Primary Analysis of Relations between Earthquakes and Short Leveling Anomalies at Jingyang Station

作　　者：黄英[1] 古云鹤 曹建平 

机构地区：[1]陕西省地震局泾阳综合地震台,陕西泾阳713704 [2]陕西省地震监测中心,陕西西安710068

出　　处：《地震工程学报》2015年第1期232-234,共3页China Earthquake Engineering Journal

基　　金：地震行业专项基金(201208009)

摘　　要：通过对泾阳地震台短水准观测资料和地震关系分析,认为观测资料对南北地震带西南方向部分地震有一定映震能力。对影响观测的问题进行初步分析。Short leveling data from Jingyang seismological station comprise some of the most important information that helps to monitor the Kouzhen—Guanshan fault zone.Several strong earthquakes have struck the surrounding area of Shaanxi Province：the Ninger M6.4earthquake on June 3,2007,the Lijiang M7.0earthquake on February 3,1996 in Yunnan,and the Anxian M5.0earthquake on September 3,1999 in Sichuan.Short leveling data from Jingyang seismological station show varying degrees of anomaly.There was an anomaly decline that lasted for 18 days at a rate of 0.005 mm per day before the Ninger M6.4earthquake,for 23 days at a rate of 0.005 mm per day before the Lijiang M7.0earthquake,and for 9days at a rate of 0.009 mm per day before the Anxian M5.0earthquake.This study evaluates the ability of short leveling data at Jingyang to predict earthquakes by analyzing the relationship between magnitude,anomaly decline rate,and duration of anomaly decline along with the relationship between magnitude and the duration of the anomaly in cross-fault deformation measurement.To intuitively portray connections among these data,this study clearly indicates anomalies in the data using charts.The data will be used in the experimental formulae of the China Earthquake Administration with other earthquakes,and the results harvested.This study considers that an ability to predict earthquakes will be revealed in the short leveling data of Jingyang seismological station,located in the southwest area of the north-south seismic zone.At the same time,this study discusses how much damage has been caused to the observation environment by the major quarries near the short leveling area and the effect that the arrival and departure of heavy trucks has had on observation data.After summarizing and rethinking the problems of seismic observation,this study gathers together certain experiences for use in future earthquake prediction and makes some suggestions to improve the quality of short leveling observation.

关 键 词：短水准 观测资料 异常 映震能力 

分 类 号：P315.725[天文地球—地震学]